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2 years ago

What’s the answer to these math problems?

Mathematics

1 answer:

baherus [9]2 years ago

4 0

Answer:

a1=4-2(1)

=4-2

a1=2

a2=4-2(2)

=4-4

a2=0

a3=4-2(3)

=4-6

a3=-2

a4=4-2(4)

=4-8

a4=-4

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Write the slope -intercept form of the equation. y-4=2(x-3)

abruzzese [7]

Answer:

y=2x-2

Step-by-step explanation:

Slope intercept form y= mx+b

y-4 = 2(x-3)

y-4= 2x-6

y-4+4= 2x-6+4

y= 2x-2

5 0

3 years ago

Solving systems of equations by graphing

Ipatiy [6.2K]

Answer:

Hi! The correct answer is x = -1 y = -1 and the ordered pair is (-1,-1)

Step-by-step explanation:

<em><u>~Solve the first variable in one of the equations, then substitute the result into the other equation~</u></em>

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3 years ago

A mattress store sells only king, queen and twin-size mattresses. Sales records at the store indicate that the number of queen-s

Nitella [24]

Answer:

The probability that the next mattress sold is either king or queen-size is P=0.8.

Step-by-step explanation:

We have 3 types of matress: queen size (Q), king size (K) and twin size (T).

We will treat the probability as the proportion (or relative frequency) of sales of each type of matress.

We know that the number of queen-size mattresses sold is one-fourth the number of king and twin-size mattresses combined. This can be expressed as:

$P_Q=\dfrac{P_K+P_T}{4}\\\\\\4P_Q-P_K-P_T=0$

We also know that three times as many king-size mattresses are sold as twin-size mattresses. We can express that as:

$P_K=3P_T\\\\P_K-3P_T=0$

Finally, we know that the sum of probablities has to be 1, or 100%.

$P_Q+P_K+P_T=1$

We can solve this by sustitution:

$P_K=3P_T\\\\4P_Q=P_K+P_T=3P_T+P_T=4P_T\\\\P_Q=P_T\\\\\\P_Q+P_K+P_T=1\\\\P_T+3P_T+P_T=1\\\\5P_T=1\\\\P_T=0.2\\\\\\P_Q=P_T=0.2\\\\P_K=3P_T=3\cdot0.2=0.6$

Now we know the probabilities of each of the matress types.

The probability that the next matress sold is either king or queen-size is:

$P_K+P_Q=0.6+0.2=0.8$

8 0

3 years ago

Graph the line perpendicular to x = -2 that passes through ( -3, 7)

erma4kov [3.2K]

Answer:

The parallel line would be y = 7

Step-by-step explanation:

If a line is parallel to x = -2, then it is a horizontal line. All horizontal lines can be written in the form of y = (a number). That number can be found as the y-coordinate in the ordered pair given.

y = 7

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3 years ago

A raffle. How many tickets will each pe

makkiz [27]

72 / 3 = 24
So the answer would be 24 hours

3 0

2 years ago